Add option to lock devices behind a password/auth-auth?

[OCopping]

On some beamlines (e.g. I19) they have found it useful to have the option of "locking" devices behind a password so that users can't go and mess around in them. Could it be useful to add a "locked" option to the create_gui.yaml?

e.g.

beamline:
  dom: p47
  desc: Test Beamline
  password: 1234          <----------

components:
  fshtr:
    desc: Fast Shutter
    prefix: BL47P-EA-FSHTR-01
    locked: true           <----------